Abstract
Fibroblast cultures derived from the skin of three Hunter heterozygotes have been examined for iduronate sulfatase deficiency primarily by measurement of [35S]-mucopolysaccharide accumulation in the presence and absence of Hunter corrective factor. For each heterozygote, two populations of clones were observed: normal and enzyme deficient, as predicted by the Lyon hypothesis. However, the phenotype of the uncloned cultures was usually normal, presumably because of cross-correction, even after storage in liquid N2. Mixing experiments indicate that the presence of a majority of cells with the Hunter phenotype may be obscured as the result of correction by the minority population of normal cells in the mixture. Variability in the ability to cross-correct was also demonstrated. The unpredictable behavior of uncloned cultures make them unsuitable for diagnosing the Hunter carrier state.
Full text
PDFSelected References
These references are in PubMed. This may not be the complete list of references from this article.
- Booth C. W., Nadler H. L. Demonstration of the heterozygous state in Hunter's syndrome. Pediatrics. 1974 Mar;53(3):396–399. [PubMed] [Google Scholar]
- Booth C. W., Nadler H. L. In vitro selection for the Hunter gene. N Engl J Med. 1973 Mar 22;288(12):636–636. doi: 10.1056/NEJM197303222881220. [DOI] [PubMed] [Google Scholar]
- Cantz M., Chrambach A., Bach G., Neufeld E. F. The Hunter corrective factor. Purification and preliminary characterization. J Biol Chem. 1972 Sep 10;247(17):5456–5462. [PubMed] [Google Scholar]
- Capobianchi M. R., Romeo G. Mosaicism for sulfoiduronate sulfatase deficiency in carriers of Hunter's syndrome. Experientia. 1976 Apr 15;32(4):459–460. doi: 10.1007/BF01920795. [DOI] [PubMed] [Google Scholar]
- Danes B. S., Bearn A. G. Hurler's syndrome: a genetic study of clones in cell culture with particular reference to the Lyon hypothesis. J Exp Med. 1967 Sep 1;126(3):509–522. doi: 10.1084/jem.126.3.509. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Donnelly P. V., Di Ferrante N. Reliability of the Booth-Nadler technique for the detection of Hunter heterozygotes. Pediatrics. 1975 Sep;56(3):429–433. [PubMed] [Google Scholar]
- Fratantoni J. C., Hall C. W., Neufeld E. F. Hurler and Hunter syndromes: mutual correction of the defect in cultured fibroblasts. Science. 1968 Nov 1;162(3853):570–572. doi: 10.1126/science.162.3853.570. [DOI] [PubMed] [Google Scholar]
- LYON M. F. Sex chromatin and gene action in the mammalian X-chromosome. Am J Hum Genet. 1962 Jun;14:135–148. [PMC free article] [PubMed] [Google Scholar]
- Liebaers I., Di Natale P., Neufeld E. F. Iduronate sulfatase in amniotic fluid: an aid in the prenatal diagnosis of the hunter syndrome. J Pediatr. 1977 Mar;90(3):423–425. doi: 10.1016/s0022-3476(77)80707-5. [DOI] [PubMed] [Google Scholar]
- Liebaers I., Neufeld E. Iduronate sulfatase activity in serum, lymphocytes, and fibroblasts--simplified diagnosis of the Hunter syndrome. Pediatr Res. 1976 Aug;10(8):733–736. doi: 10.1203/00006450-197608000-00007. [DOI] [PubMed] [Google Scholar]
- Migeon B. R., Der Kaloustian V. M., Nyhan W. L., Yough W. J., Childs B. X-linked hypoxanthine-guanine phosphoribosyl transferase deficiency: heterozygote has two clonal populations. Science. 1968 Apr 26;160(3826):425–427. doi: 10.1126/science.160.3826.425. [DOI] [PubMed] [Google Scholar]
- Neufeld E. F., Liebaers I., Epstein C. J., Yatziv S., Milunsky A., Migeon B. R. The Hunter syndrome in females: is there an autosomal recessive form of iduronate sulfatase deficiency? Am J Hum Genet. 1977 Sep;29(5):455–461. [PMC free article] [PubMed] [Google Scholar]
- Neufeld E. F., Liebaers I., Lim T. W. Iduronate sulfatase determination for the diagnosis of the Hunter syndrome and the detection of the carrier state. Adv Exp Med Biol. 1976;68:253–260. doi: 10.1007/978-1-4684-7735-1_17. [DOI] [PubMed] [Google Scholar]
- Neufeld E. F., Lim T. W., Shapiro L. J. Inherited disorders of lysosomal metabolism. Annu Rev Biochem. 1975;44:357–376. doi: 10.1146/annurev.bi.44.070175.002041. [DOI] [PubMed] [Google Scholar]